Year	% of total merchandise exports
1964	22.29168380356996
1965	16.818897637795274
1966	14.990062681547164
1967	14.679376985987394
1968	18.351519041506204
1981	24.22277892754371
1982	11.872631416117654
1983	14.197204582094086
1984	15.20552170690107
1985	17.37738619941134
1986	10.492351336748332
1987	14.329259386259904
1988	15.835278737510505
1989	10.997630150600108
1990	13.390313390313391
1991	13.028776592894273
1992	15.12885041272398
1993	13.383849557522124
1994	15.578367808994544
1995	21.597494553376904
1996	10.891429592246885
1997	19.16184279247911
1998	14.37414239975606
1999	13.696148359486449
2000	26.04176558247589
2001	29.45493800062397
2002	30.25780057543684
2003	29.86576347051526
2004	31.04878729721384
2005	33.079611385795374
2006	41.19368826972989
2007	44.14441645304602
2008	45.54949334452379
2009	49.93801114470681
2010	49.46088837825806
2011	54.79568031227935
2012	63.94088023740684
2013	73.53957109257699
2014	77.0538820056435
2015	77.00935449606135
2016	64.20304048272202
2017	61.25343916955198
2018	65.42726746870967
2019	78.83808331860115
2020	77.95604672788616